Individual study: Predator removal increased mallard Anas platyrhynchos duckling survival across four prairie sites in southern Canada
Pearse A.T. & Ratti J.T. (2004) Effects of Predator Removal on Mallard Duckling Survival. The Journal of Wildlife Management, 68, 342-350
This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.
Control predators not on islands for wildfowl
A replicated study in southern Saskatchewan, Canada, in 2000-1 (Pearse & Ratti 2004), found that survival rates of mallard Anas platyrhynchos ducklings was 41-50% higher in four 41km2 grassland-wetland sites where predators were removed (average survival rate of 59% for 686 ducklings from 78 broods), compared with four sites without predator removal (40% survival). Survival was measured until 30 days old, with a total of 686 ducklings from 78 broods studied. A total of 509 predators were removed: red foxes Vulpes vulpes, striped skunks Mephitis mephitis, raccoons Procyon lotor, coyotes Canis latrans, American badgers Taxidea taxus and American mink Neovison vison.